Finding the Fourth Proportional to 1,191.56, 1,790.37 and 1,142.96

Step by Step Solution

1. Step 1: Write the proportion equation
   1,191.56 : 1,790.37 = 1,142.96 : x
2. Step 2: Convert to fraction form
   1,191.56/1,790.37 = 1,142.96/x
3. Step 3: Cross multiply
   1,191.56x = 1,790.37 × 1,142.96
4. Step 4: Simplify right side
   1,191.56x = 2,046,312.34
5. Step 5: Solve for x
   x = 2,046,312.34/1,191.56
6. Step 6: Final answer
   x = 1,717.35